/Engine/Source/Runtime/LevelSequence/Public/LevelSequence.h
Called to validate the specified object cache by removing anything that should be deemed out of date
virtual void GatherExpiredObjects ( const [FMovieSceneObjectCache](API\Runtime\MovieScene\Evaluation\FMovieSceneObjectCache) & InObjectCache, [TArray](API\Runtime\Core\Containers\TArray)< [FGuid](API\Runtime\Core\Misc\FGuid) > & OutInvalidIDs ) const